鈻?/div>
DESCRIPTIO
Manages Total Power Between a USB Peripheral
and Battery Charger
Minimal Voltage Drop (100mV at 500mA)
Ultralow Battery Drain: 1碌A(chǔ)
Reverse Current Blocking Diode Not Required
Undervoltage Lockout
Very Few External Components
Compatible with Several LTC Linear Battery Chargers
Overtemperature Protected
Dual Battery Charge Priority Management
Low Profile (1mm) SOT-23 Package
The LTC
廬
4410 enables simultaneous battery charging and
operation of portable USB 1.0 and 2.0 compliant devices
while they are connected to a USB port. As the USB periph-
eral load increases, the LTC4410 proportionally reduces
the battery charge current to keep the total current less
than 500mA or 100mA, depending on the state of the MODE
pin.
The LTC4410 includes a USB present output that drives an
external P-channel MOSFET to disconnect the battery from
the USB peripheral when the USB power is valid. This
allows device operation when connected to the USB port,
even when the battery is deeply discharged.
Other features include reverse current blocking, thermal
shutdown and low quiescent current (80碌A(chǔ) in 500mA
MODE) that is compliant with USB Suspend Mode.
The LTC4410 is available in the low profile (1mm) SOT-23
(ThinSOT
TM
) package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
APPLICATIO S
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
Cellular Phones
PDAs
Digital Cameras
MP3 Players
Battery Backup Systems
TYPICAL APPLICATIO
100mA 500mA
4.35V TO 5.5V
FROM
USB
4.7碌F
1鈩?/div>
USB Powered Battery Charger and Power Manager
MODE
V
IN
GND
LTC4410
CHP
USBP
IRLML6401
3.4k
1%
1M
BATTERY
CHARGER
CURRENT
LOAD
CURRENT
0mA
440mA
V
OUT
4.7碌F
SYSTEM POWER
SUPPLY
200mA
OFF ON
SHDN
V
CC
TIMER
PROG
BAT
NTC
GND
1-CELL
Li-Ion
240mA
LTC4053
0.1碌F
0mA
4410 TA01
USB
LTC4410
MODE
MODE
500mA
1
100mA
0
SUSPEND
1
LTC4053
SHDN
1
1
0
sn4410 4410fs
U
System Load Step Response
5碌s/DIV
4410 TA02
U
U
1
LTC4410ES6相關(guān)型號PDF文件下載
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描述
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